While this article is written for the User Experience world the points it raises are very general . It explains why more companies are moving to structured interviews.
Despite the stress they generate, the effort they demand, and their high stakes, many hiring interviews are conducted haphazardly and lead to bad outcomes for both job seekers and UX teams. Like with user interviews or usability testing, thoughtful planning and careful moderation are essential for gathering valuable insights from hiring interviews. Ultimately, the success of a hiring interview comes down to the amount of structure utilized in the interview.
Unstructured hiring interviews are ineffective. Smart UX teams use structured interviewing to evaluate job applicants with more accuracy and less bias.
Source: Hiring Interviews Are Terrible: Smart UX Teams Structure Them